Thin display device and plasma display

ABSTRACT

A flat-panel display unit is provided which includes: a PDP; an aluminum chassis that is attached to the PDP; an upper data driver substrate and a signal processing substrate that are attached to the aluminum chassis; and a flexible cable that connects the substrates electrically. Between the substrates, a pressing plate fixes at least one part of the flexible cable, so that the space between the flexible cable and the aluminum chassis remains unchanged. Thereby, a stray capacitor can be stably formed using the insulating material of the flexible cable, and a high-frequency noise can be effectively reduced.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a flat-panel display unit, such as aplasma display or a liquid-crystal display.

2. Description of the Related Art

Inside of the frame body of electronic equipment, a signal-transmissioncable is used to transmit a signal between circuit substrates. In recentyears, a thin sheet-type flexible cable (which is generally called anFFC (or flexible flat cable) or an FPC (or flexible printed circuit))has become more popular as electronic equipment becomes smaller anddenser. In such a flexible cable, its connecter is smaller than that ofany other conventional flat cable. Thereby, the area necessary formounting a cable on a circuit substrate becomes smaller. Additionally,the flexible cable is thinner and more flexible resulting in a greaterdegree of freedom. For reasoning in addition to those discussed above,the thin sheet-type flexible cable has been used.

The problem of electromagnetic wave noise apparent as a signal istransmitted faster (i.e. with a higher frequency). Electro-magnetic wavenoise is radiated from a cable transmitting a signal between circuitsubstrates inside of electronic equipment. In order to restrain theemission of such an electro-magnetic wave noise, for example, JapanesePatent Laid-Open No. 2002-117726 specification discloses a case where athin sheet-type flexible cable is subjected to shielding. FIG. 8schematically shows the configuration of a shielded flexible cable 108.

In this flexible cable 108, a sheet-shaped shield conductor 102 and asheet-shaped insulator 101 are formed in layers. The entire stratifiedbody is covered with an insulating coat 107. Inside of the insulator101, several conductive wires are provided in parallel. These conductivewires are a high-speed signal line 103 such as a clock signal line, alow-speed signal line 106 such as a ground line 104, a shield groundline (or a shield drain line) 105, a control signal line, and the like.The shield ground line 105 is used to connect the shield conductor 102to the ground of a circuit substrate to which the flexible cable isconnected. The shield ground line is connected to the shield conductor102. The ground line 104 is not connected to the shield conductor 102and is separate. In this flexible cable 108, the high-speed signal line103 and the shield ground line 105 are adjacently disposed for thepurpose of shielding. In addition to those lines, a power-source lineand other signal lines are provided in the flexible cable 108. However,in the figure, they are omitted, and thus, only conductive, wires whichare related to the following conventional disadvantages, are shown.

In the above described flexible cable 108 which is subjected toshielding, the shield conductor 102 and the shield ground line 105contribute to reducing electro-magnetic wave noise. However, because thecable requires a multi-layer structure, it becomes an extremelyexpensive flexible cable. Additionally, as shown in FIG. 4A, if aflexible cable 11 connects substrates, some play is given. Therefore, asshown in FIG. 4A, the flexible cable 11 is disposed so as to bulge out.

However, if a flexible cable is used, for example, to connect substrateswhich are attached to an aluminum chassis 2 inside of a plasma display,then the aluminum chassis 2 is connected to a drive-system ground, asignal-system ground and a frame body. This generates a straycapacitance between the flexible cable 11 and the aluminum chassis 2.Therefore, when the flexible cable 11 is connected with such play, somedispersion can be produced in the bulge shown in FIG. 4A, thusdispersing the stray capacitance. In addition, a flexible cable isflexible and its shape is easily changed. Hence, as the shape ischanged, the stray capacitance is also changed. In this case, the morelargely the flexible cable 11 bulges out from the aluminum chassis 2,the lower the stray capacitance, resulting in the higher-harmoniccomponent of a signal inside of the flexible cable 11 being difficult todrain to a ground. This prompts a high-frequency component to radiatefrom the flexible cable 11.

BRIEF SUMMARY OF THE INVENTION

In view of the above described conventional disadvantages, it is anobject of the present invention to provide a flat-panel display unitwhich is capable of effectively restraining electro-magnetic wave noisewhich is generated by a cable, such as a flexible cable, using a simpleand inexpensive configuration.

In order to attain the above described object, a flat-panel display unitaccording to the present invention, comprising a display panel, aconductive chassis attached to the display panel, a plurality ofsubstrates attached to the conductive chassis, and a cable electricallyconnecting the substrates, wherein a fixing member is provided whichfixes at least a part of the cable between the substrates.

In the flat-panel display unit, a stray capacitance is formed, using aninsulating material of a cable, between a signal line inside of thecable and the conductive chassis. Using the fixing member, the cable isfixed between substrates, thus keeping such a stray capacitance fromdispersing. This evades a situation in which the stray capacitancebecomes small so that a higher-harmonic component cannot be drained to aground. Hence, a stray capacitor is stably formed using the cable'sinsulating material, thereby effectively reducing high-frequency noise.

Furthermore, a flat-panel display unit according to the presentinvention, comprising a display panel, a conductive chassis attached tothe display panel, a substrate attached to the conductive chassis, and acable electrically connecting the display panel and the substrate,wherein a fixing member can also be provided which fixes at least a partof the cable between the display panel and the substrate.

Herein, if the fixing member is formed by a plate-shaped member whichholds the cable so that the cable is sandwiched between it and theconductive chassis, most of the cable can be placed along the conductivechassis. This increases a stray capacitance. As a result, via the straycapacitance, a high-frequency component can flow adequately, using theconductive chassis. Therefore, high-frequency noise can be moreeffectively reduced. Further, the plate-shaped member is designed to beonly placed on the cable. Hence, using an extremely simpleconfiguration, a high-frequency noise can be effectively reduced. Inaddition, the cable is sandwiched using the plate-shaped member, so thatno bulge is required. This helps to narrow a wiring space, and thus,thin such a display unit.

Moreover, if the plate-shaped member is formed by a metal plate, thecable is sandwiched between both surfaces of metal, thereby doubling astray capacitance. Additionally, this metal plate's shielding functioncontributes to further restraining high-frequency noise from beingemitted.

In addition, if the metal plate is connected by means of a conductiveconnecting member to the conductive chassis, high-frequency noise can bedrained to the ground via this connecting member. This helps efficientlyrestrain high-frequency noise from radiating.

In addition, the cable can be formed by a flexible cable. Herein, theflexible cable is flexible and its shape is easily changed, but it isfixed on the fixing member. Thereby, even if it bears an external forceafter being attached to the substrate, its shape cannot be easilychanged. Therefore, even if the flexible cable is used, a straycapacitance can be kept constant.

If the flexible cable is formed as a single-layer structure whichincludes only an insulating layer where a signal line is disposed, thenhigh-frequency noise can be kept from radiating and costs can belowered.

It is preferable that the conductive chassis be made of aluminum.

Furthermore, a plasma display according to the present invention,comprising a plasma display panel (hereinafter, referred to as the“PDP”), a conductive chassis attached to the PDP, a plurality ofsubstrates attached to the conductive chassis, and a flexible cableelectrically connecting the substrates, wherein a fixing member may alsobe provided which fixes at least a part of the flexible cable betweenthe substrates.

Moreover, a plasma display according to the present invention,comprising a PDP, a conductive chassis attached to the PDP, a substrateattached to the conductive chassis, and a flexible cable electricallyconnecting the PDP and the substrate, wherein a fixing member may alsobe provided which fixes at least a part of the flexible cable betweenthe PDP and the substrate.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a rear view of a plasma display according to a firstembodiment of the present invention, showing its external appearance.FIG. 1B is a sectional view of the plasma display, seen along a I-I lineof FIG. 1A.

FIG. 2 is a sectional view of an example of a flexible cable which isused in the plasma display.

FIG. 3A is a front view of a pressing plate according to the firstembodiment of the present invention. FIG. 3B is a side view of thispressing plate. FIG. 3C is a bottom view of this pressing plate.

FIG. 4A and FIG. 4B are each a rear view of a plasma display, comparinga conventional example and the first embodiment of the presentinvention. FIG. 4A corresponds to FIG. 1B in the conventional example.FIG. 4B corresponds to FIG. 1B in the first embodiment.

FIG. 5A is an illustration, showing a stray capacitance which is formedbetween a flexible cable and an aluminum chassis.

FIG. 5B is an illustration, showing its equivalent circuit.

FIG. 6A is a sectional view of a pressing plate according to a secondembodiment of the present invention. FIG. 6B is a sectional view of thispressing plate which is connected to an aluminum chassis.

FIG. 7A is a sectional view of a pressing plate according to a thirdembodiment of the present invention which is connected to an aluminumchassis. FIG. 7B is a sectional view of the pressing plate, seen along aVII-VII line of FIG. 7A.

FIG. 8 is a sectional view of a shielded flexible cable.

DETAILED DESCRIPTION OF THE INVENTION

Best modes for implementing the present invention will be described withreference to drawings.

First Embodiment

As shown in FIGS. 1A and 1B, in a plasma display 1 according to a firstembodiment of the present invention, an aluminum chassis 2 is attachedto the rear side of a PDP 10. This aluminum chassis 2 is formed by analuminum die-casting. To this aluminum chassis 2, a plurality ofsubstrates are each attached at a predetermined position, such as asustain driver substrate 3, a scan driver substrate 4, a lower datadriver substrate 5, an upper data driver substrate 6 and a signalprocessing substrate 7. The signal processing substrate 7 is locatedsubstantially in the middle of the aluminum chassis 2. Below this signalprocessing substrate 7, the lower data driver substrate 5 is placed, andthe upper data driver substrate 6 is located above it. In FIG. 1A, thesustain driver substrate 3 and the scan driver substrate 4 are disposedon the right side and the left side of the signal processing substrate7, respectively.

The above described substrates 3, 4, . . . are connected electrically.For example, as shown in FIG. 1A, the lower data driver substrate 5 andthe signal processing substrate 7 are electrically connected via aflexible cable 8 a. The upper data driver substrate 6 and the signalprocessing substrate 7 are electrically connected via a flexible cable 8b. Similarly, the scan driver substrate 4 and the signal processingsubstrate 7 are electrically connected via a flexible cable 8 c. Thesustain driver substrate 3 and the signal processing substrate 7 areelectrically connected via a flexible cable 8 d. The signal processingsubstrate 7 lies exactly in the middle between the lower data driversubstrate 5 and the upper data driver substrate 6. In short, theflexible cable 8 a and the flexible cable 8 b have substantially thesame length. This makes it easy to set timing.

Hereinafter, the flexible cable 8 b will be described which is used toconnect the upper data driver substrate 6 and the signal processingsubstrate 7. The other flexible cables which connect their predeterminedsubstrates are similar, and thus, their description is omitted. Herein,a connecter is provided at both ends of the flexible cable 8 b, thoughthey are not shown, for convenience, in FIGS. 1A and 1B. Such aconnecter is fitted to a connecter of each substrate 6, 7, so that theflexible cable 8 b is connected to the substrate 6, 7.

The flexible cable 8 b which connects the upper data driver substrate 6and the signal processing substrate 7 is formed, for example, as shownin FIG. 2, as a single-layer structure which has no shield layer.Specifically, this flexible cable 8 b includes a sheet-type insulator 20in which several signal lines 21, 22, 23, 24 are disposed in the widthdirections of the flexible cable. It does not include such a shieldconductor as shown in FIG. 8. In other words, the flexible cable 8 b hasno multi-layer structure. The insulator 20 is covered with an insulatingcoat 27. Herein, this insulating coat 27 may also be omitted. The abovedescribed signal lines are a high-speed signal line 21, a low-speedsignal line 22, a shield ground line 23, a ground line 24 and the like.For convenience, the other signal lines are not shown in the figure. Theflexible cable 8 b sends a signal, for example, at a transfer rate of 50to 60 mbps.

The flexible cables 8 a, 8 b are fixed at their predetermined partsbetween the connecters, as shown in FIGS. 1A and 1B, by pressing plates9 a, 9 b, respectively. These pressing plates 9 a, 9 b are examples of afixing member which fixes the flexible cable 8 a, 8 b on the aluminumchassis 2. In this first embodiment, the pressing plates 9 a, 9 b areformed by a metal plate. For example, the metal plate is made of rolledsteel, stainless steel, aluminum, aluminum alloy, copper, copper alloy,or the like. Additionally, the material of the pressing plates 9 a, 9 bis not limited to metal, and thus, it may also be made of resin oranother material.

As shown in FIGS. 3A to 3C, the pressing plates 9 a, 9 b include a pairof pressing portions 31, 31 and a connection portion 33 which connectsboth pressing portions 31, 31. Each pressing portion 31, 31 is a partwhich presses and holds the flexible cables 8 a, 8 b on the aluminumchassis 2. Each pressing portion 31, 31 has a long rectangularflat-plate shape, and they have the same shape. Each pressing portion31, 31 is placed to extend along the length directions of the flexiblecables 8 a, 8 b.

The pressing plates 9 a, 9 b may also fix the two flexible cables 8 a, 8b, using both pressing portions 31, 31. Or, a single flexible cable 8 a,8 b may also be fixed, using one pressing portion 31.

In addition, they are not limited to a form in which the two flexiblecables 8 a, 8 b can be fixed. A form where only a single flexible cable8 a, 8 b is fixed may also be used.

The connection portion 33 is formed to connect one long side of eachpressing portion 31, 31. In the other three sides of each pressingportion 31, 31, their ends are bent so that the flexible cables 8 a, 8 bwill not be damaged.

As shown in FIG. 3C, the connection portion 33 is bent into a shapeprotruding from the pressing portions 31, 31. This shape enables eachpressing portion 31, 31 to press down the flexible cables 8 a, 8 b, eventhough the connection portion 33 comes into contact with a boss (notshown) which is provided to protrude in the aluminum chassis 2. Besides,in the connection portion 33, two connection holes 35, 35 are formed.Into each connection hole 35, 35, a screw (not shown) is inserted, andthen, it is fitted into the above described boss. Thereby, the pressingplates 9 a, 9 b can be fixed on the aluminum chassis 2. In other words,in this first embodiment, the two connection holes 35, 35 are formed inthe connection portion 33. Thus, at two places in the length directionsof the flexible cables 8 a, 8 b, the pressing plates 9 a, 9 b aredesigned to be fixed on the aluminum chassis 2. Herein, how to fix thepressing plates 9 a, 9 b is not limited to driving a screw. For example,they can also be fixed, using a connection by means of a rivet (notshown), staking, or the like.

The flexible cables 8 a, 8 b are sandwiched between the aluminum chassis2 and the pressing plates 9 a, 9 b. As a whole, they are attachedtightly to the aluminum chassis 2 and the pressing plates 9 a, 9 b.Herein, in this first embodiment, the aluminum chassis 2 is formed bydie-casting, and thus, its surface is rough. This may leave somecrevices between the aluminum chassis 2 and the flexible cables 8 a, 8b. The width of such a crevice is thought to be approximately 1 to 2 mmat its place. There is a case where a protruding rib (not shown) isprovided in the aluminum chassis 2 and the flexible cables 8 a, 8 b aredisposed to stride over this rib. In that case, such a rib also givesspace between the aluminum chassis 2 and the flexible cables 8 a, 8 b,and as a result, the space becomes 3 to 5 mm.

In this embodiment, as shown in FIG. 1 and FIG. 4B, the pressing plates9 a, 9 b can attach the flexible cables 8 a, 8 b closely to the aluminumchassis 2. Hence, compared with the conventional example shown in FIG.4A, a stray capacitance can be raised. Specifically, as shown in FIG.5A, a signal line 41 which is formed by, for example, a copper wire inthe flexible cable 8 a(8 b). A capacitance C between the signal line 41and the aluminum chassis 2 can be expressed as a combined capacitance ofa capacitance Ca of air and a capacitance Cf of an insulating layer 43which is formed by the insulator 20 and the insulating coat 27. Herein,a relative dielectric constant ∈_(a) of air is 1 and a relativedielectric constant ∈_(f) of the insulating layer is 4.3 to 4.4. Takingthis into account and an equivalent circuit shown in FIG. 5B, thecombined capacitance C can be expressed by the following.

$C = {\frac{1}{\frac{1}{Ca} + \frac{1}{Cf}} = {\frac{{Cf} \cdot {Ca}}{{Cf} + {Ca}} = {\frac{Ca}{1 + \frac{Ca}{Cf}} \approx {{Ca}\mspace{14mu}\left( {{Cf}\operatorname{>>}\;{C\; a}} \right)}}}}$

Therefore, in order to make a stray capacitance greater, it is desirablethat a crevice be made as narrow as possible. Preferably, the flexiblecable 8 a(8 b) should be attached tight to the aluminum chassis 2.Herein, as described earlier, even if there are several spaces of about1 to 5 mm between the aluminum chassis 2 and the pressing plate 9 a(9b), a stray capacitance can be secured to such a degree that ahigher-harmonic component could flow to a ground.

As described so far, in this first embodiment, the pressing plates 9 a,9 b fix the flexible cables 8 a, 8 b, respectively, so that the distancebetween the flexible cables 8 a, 8 b and the aluminum chassis 2 will notbe changed. This helps relatively keep a stray capacitance fromdispersing. In other words, in the conventional example shown in FIG.4A, the value of a stray capacitance depends upon how the cable bulges.In contrast, in this first embodiment, the flexible cables 8 a, 8 b arefixed by the pressing plates 9 a, 9 b, thereby stabilizing the value ofa stray capacitance. Therefore, the stray capacitance is not easilyreduced so that the higher-harmonic component is difficult to drain toground. Hence, a stray capacitor is stably formed using the insulatingmaterial of the flexible cables 8 a, 8 b. This helps effectively reducehigh-frequency noise.

Furthermore, the pressing plates 9 a, 9 b press the flexible cables 8 a,8 b onto the aluminum chassis 2, so that the flexible cables 8 a, 8 b goalong the aluminum chassis 2. This helps increase a stray capacitance.Therefore, via a stray capacitor, high-frequency component can bedrained in larger quantities to the aluminum chassis 2 (i.e., ground).This helps reduce high-frequency noise more efficiently.

Moreover, most of the flexible cables 8 a, 8 b between the substrates 5,6, 7 are sandwiched between the pressing plates 9 a, 9 b and thealuminum chassis 2. Therefore, in a great part across these substrates5, 6, 7, the flexible cables 8 a, 8 b can be fixed so that the spacebetween the flexible cables 8 a, 8 b and the aluminum chassis 2 remainsunchanged. Consequently, the flexible cables 8 a, 8 b can be kept fromchanging the value of a stray capacitance. Herein, the range that theflexible cables 8 a, 8 b are pressed down may be properly decided,taking a voltage into account.

In this first embodiment, the flexible cables 8 a, 8 b are each used toelectrically connect each data driver substrate 5, 6 and the signalprocessing substrate 7, 7 are fixed by the pressing plates 9 a, 9 b,respectively. However, it is not limited to this configuration in whichthe cables 8 a, 8 b are fixed. Specifically, in the plasma display 1, asdescribed already, for example, a large number of substrates, such asthe sustain driver substrate 3 and the scan driver substrate 4, areattached to the aluminum chassis 2. Hence, at least a part of the cables8 c, 8 d which connect the substrates 3, 4, can be designed to be fixedby a pressing plate. Further, all cables can also be fixed by pressingplates.

In addition, the present invention is not limited to a configuration inwhich the cables 8 a, 8 b, . . . which connect the substrates 3, 4, . .. are fixed. For example, a cable which electrically connects the PDP 10and a substrate can also be configured to be fixed at certain part by apressing plate. For example, FIG. 1 illustrates a configuration in whicha flexible cable 8 e which electrically connects the PDP 10 and thesustain driver substrate 3 is fixed at a part between the PDP 10 and thesustain driver substrate 3 by a pressing plate 9 c.

Second Embodiment

In the above described first embodiment, the pressing plates 9 a, 9 bare connected to the flexible cables 8 a, 8 b, at two places in theirlength directions. However, in this second embodiment, as shown in FIGS.6A and 6B, such a connection is made at one place in the lengthdirections of a flexible cable 8. In this case, a pressing plate 9 mayalso be wider than the flexible cable 8, so that this pressing plate 9can be connected to both sides of the flexible cable 8. As shown in thefigure, a boss 47 with a screw hole 48 is pushed into the aluminumchassis 2. Then, a screw 50 for fixing the pressing plate 9 is fittedinto this boss 47. Thereby, the pressing plate 9 is fixed on thealuminum chassis 2.

As shown in FIG. 6A, in the case of the pressing plate 9 works as aspring, using its biasing force, it can press the flexible cable 8 moreeffectively. This pressing plate 9 may also be a metal plate, as long asit functions as a leaf spring. Additionally, may also be a non-metallicplate which is made of resin or the like.

Hence, the configuration in which the flexible cable 8 is fixed at oneplace in its length directions is suitable for a case where the aluminumchassis 2 is formed by not a die casting but a press plate to have asmooth surface, or another such case.

If the aluminum chassis 2 has a smooth surface, the flexible cable 8 canbe attached close to the surface of the aluminum chassis 2. Therefore,if the present invention is applied to an aluminum chassis 2 formed by apress plate, it is extremely effective.

Herein, the other configurations, operation and advantages are the sameas those of the first embodiment.

Third Embodiment

A plasma display according to a third embodiment of the presentinvention will be described with reference to FIGS. 7A and 7B. In thosefigures, the aluminum chassis 2 and the flexible cable 8 are the same asthose of the first embodiment. Herein, the parts which are differentfrom those of the first embodiment are described. Hence, the samereference numerals are given to the same configurations as those of thefirst embodiment, and thus, their description is omitted.

In this third embodiment, a pressing plate 12 is electrically connectedto the aluminum chassis 2. The pressing plate 12 is, for example, analuminum plate. Additionally, a boss 13 with a screw hole 16 is buriedinto the aluminum chassis 2. Then, into the screw hole 16 of the boss13, a conductive screw 14 is fitted which is inserted through a screwinsertion hole 18 of the pressing plate 12. For example, a steelmaterial can be used for the screw 14, the material being subjected tometallic plating (e.g., nickel plating) with low conductivity.Therefore, the screw 14 connects the pressing plate 12 and the boss 13,so that the pressing plate 12 can be electrically connected to thealuminum chassis 2.

As described above, the pressing plate 12 fixes the flexible cable 8 sothat its shape could not be changed. In addition, this pressing plate 12is formed by a metal plate. Hence, the flexible cable 8 is surroundedwith this pressing plate 12 and the aluminum chassis 2. This helpsdouble a stray capacitance and effectively restrain high-frequency noisefrom radiating. Additionally, the pressing plate 12 is electricallyconnected to the aluminum chassis 2. This means that both the aluminumchassis 2 and the pressing plate 12 are connected to a ground. As aresult, via the pressing plate 12, high-frequency noise can be by-passedto ground.

Therefore, the flexible cable 8 is attached tightly to the aluminumchassis 2, so that high-frequency noise can be kept down. Furthermore,the metallic pressing plate 12 fixes the flexible cable 8, thusrealizing a shielding effect, using an inexpensive configuration.Moreover, such an increase in stray capacitance contributes to reducinghigh-frequency noise further.

Herein, in this third embodiment, via the screw 14, the pressing plate12 is electrically connected to the aluminum chassis 2. However, thepresent invention is not limited to the above. Thus, otherconfigurations may also be used, as long as conductivity can be obtainedbetween the pressing plate 12 and the aluminum chassis 2.

This application is based on Japanese patent application serial No.2003-112355, filed in Japan Patent Office on Apr. 17, 2003, the contentsof which are hereby incorporated by reference.

Although the present invention has been fully described by way ofexample with reference to the accompanied drawings, it is to beunderstood that various changes and modifications will be apparent tothose skilled in the art. Therefore, unless otherwise such changes andmodifications depart from the scope of the present invention hereinafterdefined, they should be construed as being included therein.

INDUSTRIAL APPLICABILITY

The present invention can be used for a flat-panel display unit with aconductive chassis, such as a plasma display and a liquid-crystaldisplay.

1. A flat-panel display unit comprising: a display panel; a conductivechassis attached to the display panel; a plurality of substratesattached to the conductive chassis; a cable electrically connecting thesubstrates; and a plate-shaped member which fixes at least a part of thecable connected between the substrates such that the cable is sandwichedbetween the plate-shaped member and the conductive chassis.
 2. Aflat-panel display unit comprising: a display panel; a conductivechassis attached to the display panel; a substrate attached to theconductive chassis; a cable electrically connecting the display paneland the substrate; and a plate-shaped member which fixes at least a partof the cable connected between the display panel and the substrate suchthat the cable is sandwiched between the plate-shaped member and theconductive chassis.
 3. The flat-panel display unit according to claim 1,wherein the plate-shaped member is formed by a metal plate.
 4. Theflat-panel display unit according to claim 3, wherein the metal plate isconnected to the conductive chassis by a conductive connecting member.5. The flat-panel display unit according to claim 1, wherein the cableis formed by a flexible cable.
 6. The flat-panel display unit accordingto claim 5, wherein the flexible cable is formed as a single-layerstructure.
 7. The flat-panel display unit according to claim 1, whereinthe conductive chassis is made of aluminum.
 8. A plasma displaycomprising: a plasma display panel; a conductive chassis attached to theplasma display panel; a plurality of substrates attached to theconductive chassis; a flexible cable electrically connecting thesubstrates; and a plate-shaped member which fixes at least a part of theflexible cable connected between the substrates such that the cable issandwiched between the plate-shaped member and the conductive chassis.9. A plasma display comprising: a plasma display panel; a conductivechassis attached to the plasma display panel; a substrate attached tothe conductive chassis; a flexible cable electrically connecting theplasma display panel and the substrate; and a plate-shaped member whichfixes at least a part of the flexible cable connected between the plasmadisplay panel and the substrate such that the cable is sandwichedbetween the plate-shaped member and the conductive chassis.
 10. Theflat-panel display unit according to claim 2, wherein the plate-shapedmember is formed by a metal plate.
 11. The flat-panel display unitaccording to claim 10, wherein the metal plate is connected by means ofa conductive connecting member to the conductive chassis.
 12. Theflat-panel display unit according to claim 2, wherein the cable isformed by a flexible cable.
 13. The flat-panel display unit according toclaim 12, wherein the flexible cable is formed as a single-layerstructure.
 14. The flat-panel display unit according to claim 2, whereinthe conductive chassis is made of aluminum.
 15. A flat-panel displayunit comprising: a display panel; a conductive chassis attached to thedisplay panel; a plurality of substrates attached to the conductivechassis; a cable electrically connecting the substrates; and aplate-shaped member which fixes at least a part of the cable connectedbetween the substrates such that at least the part of the cableconnected between the substrates extends along the conductive chassis.16. A flat-panel display unit comprising: a display panel; a conductivechassis attached to the display panel; a substrate attached to theconductive chassis; a cable electrically connecting the display paneland the substrate; and a plate-shaped member which fixes at least a partof the cable connected between the display panel and the substrate suchthat at least the part of the cable connected between the display paneland the substrate extends along the conductive chassis.
 17. A plasmadisplay comprising: a plasma display panel; a conductive chassisattached to the plasma display panel; a plurality of substrates attachedto the conductive chassis; a flexible cable electrically connecting thesubstrates; and a plate-shaped member which fixes at least a part of theflexible cable connected between the substrates such that at least thepart of the flexible cable connected between the substrates extendsalong the conductive chassis.
 18. A plasma display comprising: a plasmadisplay panel; a conductive chassis attached to the plasma displaypanel; a substrate attached to the conductive chassis; a flexible cableelectrically connecting the plasma display panel and the substrate; anda plate-shaped member which fixes at least a part of the flexible cableconnected between the plasma display panel and the substrate such thatat least the part of the flexible cable connected between the plasmadisplay panel and the substrate extends along the conductive chassis.